56615173 has 4 divisors (see below), whose sum is σ = 56645260. Its totient is φ = 56585088.

The previous prime is 56615159. The next prime is 56615189. The reversal of 56615173 is 37151665.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 37151665 = 5 ⋅7430333.

It can be written as a sum of positive squares in 2 ways, for example, as 27217089 + 29398084 = 5217^2 + 5422^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56615173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56615123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12018 + ... + 16051.

It is an arithmetic number, because the mean of its divisors is an integer number (14161315).

Almost surely, 2^56615173 is an apocalyptic number.

It is an amenable number.

56615173 is a deficient number, since it is larger than the sum of its proper divisors (30087).

56615173 is a wasteful number, since it uses less digits than its factorization.

56615173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30086.

The product of its digits is 18900, while the sum is 34.

The square root of 56615173 is about 7524.3054829001. The cubic root of 56615173 is about 383.9820706509.

The spelling of 56615173 in words is "fifty-six million, six hundred fifteen thousand, one hundred seventy-three".